Posttraumatic Stress May Change Pain
People With PTSD May Tolerate Pain More
Jan. 2, 2007 -- Posttraumatic stress disorder (PTSD) may alter the way the
brain handles pain, a new study shows.
The researchers included Elbert Geuze, PhD, of the Netherlands' Department
of Military Psychiatry. Their study appears in the Archives of General
Geuze and colleagues studied 24 male Dutch veterans who had served on U.N.
peacekeeping missions in Lebanon, Cambodia, or Bosnia.
Half of the veterans had PTSD; the others had no history of PTSD. All were
33-34 years old, on average.
PTSD Pain Test
The veterans rated how much pain they felt when their hands were briefly
subjected to heat at temperatures ranging from 104-118 degrees Fahrenheit.
Those with PTSD had a higher tolerance for the heat, compared to those
The veterans also got brain scans using functional magnetic resonance
imaging (fMRI) while they took the heat test.
Those brain scans showed different patterns of brain activity between the
veterans with and without PTSD.
For instance, the veterans with PTSD showed less activity in part of their
amygdala, a brain area that's involved in the brain's pain response.
The veterans with PTSD reported more stress during the brain scans. It's not
clear if that influenced the results, the researchers note.
While the veterans with PTSD appeared to feel less pain than those without
PTSD, other studies have linked PTSD to a greater sense of pain.
Future studies should include civilians with PTSD, note Geuze and